Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Device for detecting failure in piezoelectric apparatus










Image Number 10 for United States Patent #5376854.

A drive circuit for driving a piezoelectric element includes a transformer having a primary winding connected to a power source and a secondary winding connected to the piezoelectric element, a primary semiconductor element circuit connected to the primary winding for switching the current through the primary winding, and a secondary semiconductor element circuit connected to the secondary winding for switching the current through the secondary winding. A failure detection unit responsive to the potential at a predetermined point of the drive circuit is provided for detecting a failure in the piezoelectric apparatus and outputting a failure detection signal.








 
 
  Recently Added Patents
Heteroleptic iridium complexes as dopants
Light emitting diode having multi-cell structure and method of manufacturing the same
Method for culturing lactic acid bacterium and method for producing fermented milk
Media used in digital high speed inkjet web press printing
Enhanced telephony services
Laser protection polymeric materials
Flexible lighting devices
  Randomly Featured Patents
Chassis with mirror, for an under vehicle inspection device
Process of making fibers with a rotary ring furnace above a circular forehearth
Photosensitive elastomeric polymer composition for flexographic printing plate
Automated parking director systems and related methods
Mounting structure for magnetic linear scale unit
Semiconductor device
Locking differential having a split-center driver
Electrodeposition of ruthenium-iridium alloy
Sensor thin film transistor, thin film transistor substrate having the same, and method of manufacturing the same
Base station, radio terminal and radio communication method